Question

me pueden ayudar con estas ecuaciones
1._ 4x + 3=2x+ 9
2._ 2x/3 =10
3._ 3 (x - 7) = 5( x - 1 ) - 4x

Answer 1

primero

$4x + 3 = 2x + 9 \\ 2x = 6 \\ x = 3$

segundo

$2x \div 3 = 10 \\ 2x = 30 \\ x = 15$

tercero

$3(x - 7) = 5(x - 1) - 4x \\ 3x - 21 = 5x - 5 - 4x \\ 3x - 21 = x - 5 \\ 2x = 21 - 5 \\ 2x = 16 \\ x = 8$

Answer 2

Respuesta:

(1) x = 3

(2) x = 15

(3) x = 8

Explicación paso a paso:

(1)

4x + 3=2x+ 9

4x - 2x = 9 - 3

2x = 6

x = 6/2

x = 3

(2)

2x/3 = 10

2x = 10*3

2x = 30

x = 30/2

x = 15

(3)

3 (x - 7) = 5( x - 1 ) - 4x

3x - 21 = 5x - 5 - 4x

3x - 21 = x - 5

3x - x = - 5 + 21

2x = 16

x = 16/2

x = 8